O30.21Header code — not billable
Quadruplet pregnancy with two or more monochorionic fetuses
- Chapter
- 15. Pregnancy, childbirth and the puerperium
- Category
- O30
- Effective date
- October 1, 2026
Related codes in category O30
O30Multiple gestationO30.0Twin pregnancyO30.00Twin pregnancy, unsp num plcnta & amnio sacsO30.001Twin preg, unsp num plcnta & amnio sacs, first trimesterYesO30.002Twin preg, unsp num plcnta & amnio sacs, second trimesterYesO30.003Twin preg, unsp num plcnta & amnio sacs, third trimesterYesO30.009Twin pregnancy, unsp num plcnta & amnio sacs, unsp trimesterYesO30.01Twin pregnancy, monochorionic/monoamnioticO30.011Twin pregnancy, monochorionic/monoamniotic, first trimesterYesO30.012Twin pregnancy, monochorionic/monoamniotic, second trimesterYesO30.013Twin pregnancy, monochorionic/monoamniotic, third trimesterYesO30.019Twin pregnancy, monochorionic/monoamniotic, unsp trimesterYes
Frequently asked questions
What is ICD-10 code O30.21?
O30.21 is an ICD-10-CM diagnosis code for Quadruplet pregnancy with two or more monochorionic fetuses.
Is O30.21 a billable code?
No. O30.21 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is O30.21 in?
O30.21 falls under Chapter 15: Pregnancy, childbirth and the puerperium.
When did O30.21 become effective?
O30.21 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to O30.21?
O30.21 belongs to category O30, which includes 12 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.